Fix incomplete date format

app/views/conferences/stats.html.erb

@@ -13,7 +13,7 @@
       <li><%= @day_stats.keys.count %> days
         <ul>
           <% @day_stats.each do |day, stats| %>
-            <li><%= day.strftime('%a %b, %Y') %>:
+            <li><%= day.strftime('%a %b %d, %Y') %>:
               <%= stats[:starts_at].strftime('%H:%M') %>&ndash;<%= stats[:ends_at].strftime('%H:%M') %>,
               <%= stats[:wall_clock_time_min].round %> minutes wall clock time (<%= (stats[:wall_clock_time_min] / 60.0).round(2) %> hours),
               <%= stats[:scheduled_time_min].round %> minutes scheduled (<%= (stats[:scheduled_time_min] / 60.0).round(2) %> hours) in <%= stats[:sessions_count] %> sessions